Project Advancements
November 15 - November 24, 2014
During the next 10 days, Central Subway work continues at sites in SoMa, Union Square, Chinatown and North Beach. This section contains brief updates about recent construction activities and a look-ahead for what to expect in each neighborhood. For more detailed information, scroll down or click on the links below. You can also find construction, traffic detour, and Muni impact information on our project Google Map.
Construction schedules may change due to unforeseen conditions. We encourage the public to follow traffic and pedestrian notifications posted at the work sites.
Southern SoMa (Harrison to King): Construction crews are relocating and installing new utilities along 4th Street from Harrison to King streets.
- At the intersection of 4th and Harrison streets, work on a high pressure water line continues.
- Two traffic lanes will remain open Monday to Friday, 7 a.m. to 3 p.m.
- On 4th Street between Harrison and Bryant streets, one traffic lane will be available starting Nov. 20 through Nov. 26.
- Access to Interstate 80 freeway may be limited on some evenings from 8 p.m. to 5 a.m. and during weekends.
- Two traffic lanes will remain open Monday to Friday, 7 a.m. to 3 p.m.
- On 4th Street between Bryant and Welsh streets, AT&T vault installation continues.
- Muni service impact: The bus stop on Bryant Street at 4th Street has been relocated to the mid-block of Bryant Street between 4th and 5th streets until Nov. 25.
Northern SoMa (Market to Harrison): Construction crews are building walls and replacing a water line along 4th Street between Howard and Folsom streets.
- On 4th Street between Folsom and Harrison streets, sewer line replacement continues.
- Two traffic lanes will remain open Monday to Friday, 7 a.m. to 4 p.m.
- Parking in this area may be limited.
Union Square: Construction crews are excavating the site, building station walls and relocating utilities on Stockton Street between Ellis Street and Maiden Lane. Work on restoring portions of this area for the holidays continues.
- For a look at the restoration work on Stockton Street, click here.
Chinatown: Construction crews are building station walls and installing new utilities on Stockton Street between Sacramento and Washington streets.
- On Washington Street between Stockton and Spofford streets, replacement of a high pressure water line and installation of a fire hydrant continues.
- Work hours are Monday to Friday, 7 a.m. to 5 p.m.
- Parking may be impacted in the vicinity of the construction area.
North Beach: Construction crews continue to restore the retrieval shaft site.
We thank the businesses, residents, shoppers, and commuters of San Francisco for their continued engagement with this significant investment in the extension of our public transportation system. When opened in 2019, the Central Subway will provide a much-needed connection between major employment, retail, cultural and residential areas of the city.
The Central Subway Team 
On 4th Street between Freelon and Brannan streets, workers clean up a portion of the roadway. A new surface station will be built at this location for the extension of the T Third Line. Southern SoMa
4th Street from Harrison Street to King Street
On 4th Street between Harrison and Bryant streets, the contractor constructed a major excavation known as a launch box at the site where the two Central Subway tunnels begin. This site is being converted to a portal. Underground operations are based here.
On 4th Street between Bryant and King streets, relocation and installation of utilities continues.
Ongoing construction (Harrison to Bryant):
- High pressure waterline installation at intersection of 4th and Harrison streets.
- Portal construction continues.
Traffic and pedestrian impacts (Harrison to Bryant):
- At the intersection of 4th and Harrison streets:
- Two traffic lanes will remain open Monday to Friday, 7 a.m. to 3 p.m.
- Access to Interstate 80 freeway may be limited on some evenings from 8 p.m. to 5 a.m. and during weekends.
- Parking may be impacted in the vicinity of the construction area.
- The two lanes on the east side of 4th Street will remain open to vehicle traffic except as described below:
- Possibility of full closure of block from 8 p.m. to 5:30 a.m. on weeknights and all day Saturday and Sunday.
- On 4th Street between Harrison and Bryant streets, one traffic lane will be available starting Nov. 20 through Nov. 26.
- The sidewalk on the west side of the block will remain closed.
- Possibility of full closure of block from 8 p.m. to 5:30 a.m. on weeknights and all day Saturday and Sunday.
Ongoing construction (Bryant to King):
- AT&T duct bank and vault installation on 4th Street between Bryant and Bluxome streets.
- Sewer line installation on 4th Street between Brannan and Welsh streets.
- Work may involve saw-cutting and jack-hammering in the roadway and sidewalk. Expect an increase in noise.
- Work hours are Monday to Friday, 7 a.m. to 3:30 p.m.
Traffic and pedestrian impacts (Bryant to King):
- Muni service impact: The bus stop on Bryant Street at 4th Street has been relocated to the mid-block of Bryant Street between 4th and 5th streets until Nov. 25.
- During work hours, two traffic lanes will remain open on 4th Street from Bryant to Brannan streets.
- Parking may be impacted in the vicinity of the construction zone.
- Sidewalk access may be limited. The contractor will maintain a safe path of travel.
- The contractor will maintain access to businesses during business hours.
A worker adjusts portions of the construction barricades to allow more space for the equipment to move. Northern SoMa
4th Street from Market Street to Harrison Street
On 4th Street between Howard and Folsom streets, work to construct the Yerba Buena/Moscone Station continues. The construction of underground station walls and replacement of a water line is ongoing. Night work continues from 8 p.m. to 5 a.m., Monday through Friday.
On 4th Street between Folsom and Harrison streets, work on replacement of a sewer line continues.
Ongoing construction (Howard to Folsom):
- Construction of station walls.
- Replacement of water line at 4th and Folsom streets.
Traffic and pedestrian impacts (Howard to Folsom):
- One lane of traffic will remain open on 4th Street from Howard to Folsom streets.
- One additional traffic lane is anticipated to be restored by late November.
- Street closure of Clementina Street at 4th Street.
- The sidewalk along 4th Street between Clementina and Folsom streets is closed.
- Lane reductions at intersection of Folsom and 4th streets during water line work.
Ongoing construction (Folsom to Harrison):
- Replacement of a sewer line.
- Work hours are 7 a.m. to 3 p.m.
Traffic and pedestrian impacts (Folsom to Harrison):
- Two traffic lanes will remain open on 4th Street between Folsom and Harrison streets during sewer line work.
- Access to the I-80 freeway may be reduced to one lane during sewer line work.
- Parking may be impacted in the vicinity of the construction zone.
In preparation for the upcoming holiday season, workers roll out the green carpet on Stockton Street. An upcoming event called "Winter Walk SF" will take place in this area. Union Square
Stockton Street from Ellis Street to Post Street
On Stockton Street between Ellis and Post streets, the contractor is building the Union Square/Market Street Station. Stockton Street between Ellis Street and Geary Boulevard is closed to vehicular traffic. Most work is now focused on the restoration of the site for the holiday season.
On Ellis Street between Stockton and Powell streets, crews continue with pile installation to construct station walls.
Ongoing construction (Ellis to Post):
- Site restoration on Stockton Street between Ellis Street and Geary Boulevard.
- Pile installation to construct station walls and utility relocation on Stockton Street between Geary Boulevard and Maiden Lane.
- Construction hours are reduced from 24 hours. Hours are now 6 a.m. to midnight, Monday to Saturday, Sunday work may be required.
- Sunday work on Nov.16 and 22 is anticipated.
Traffic, transit and pedestrian impacts (Ellis to Post):
- Stockton Street between Ellis Street and Geary Boulevard is closed to vehicular traffic.
- The sidewalk on the northeast corner of Stockton Street at O'Farrell Street has reopened.
- Stockton Street at Geary Boulevard and at O'Farrell streets, traffic lanes merge to one lane.
- Muni service impact: The bus stop on Geary Boulevard at Stockton Street is anticipated to reopen in late November.
Ongoing construction (Ellis Street):
- Pile installation to construct station walls.
Traffic, transit and pedestrian impacts (Ellis Street):
- Ellis Street between Stockton and Powell streets is temporarily closed to westbound traffic heading toward Powell Street.
A crane is used to lower rebar into the ground. Rebar is used to strengthen the walls that will form the future Chinatown Station. Chinatown
Stockton Street from Sacramento Street to Washington Street
At 933-949 Stockton Street, construction of Chinatown Station is underway.
Ongoing construction (Sacramento to Washington):
- Construction of station walls.
- Construction hours are Monday to Saturday, 7 a.m. to 11 p.m.
- Replacement of a high pressure water line and installation of a fire hydrant on Washington Street between Stockton and Spofford streets.
- Construction hours are Monday to Friday, 7 a.m. to 5 p.m.
- Rebar delivery between the hours of 4 and 6 a.m.
Traffic, transit and pedestrian impacts (Sacramento to Washington):
- Washington Street:
- Between Stockton and Trenton streets remains closed.
- Between Powell Street and the construction zone is converted into a two-way street.
- Between Stockton and Spofford streets, parking may be limited during construction hours.
The tunnels created by the tunnel boring machines are seen here at 1731-1741 Powell Street. The two tunnels were created in under a year. North Beach
Powell Street from Union Street to Filbert Street
At 1731-1741 Powell, restoration of the site continues.The work at this location is expected to be completed by the end of this year.
On Columbus Avenue between Union and Filbert streets, street lighting will be completed by the end of 2014.
Ongoing construction (1731-1741 Powell):
- Restoration of the site.
- Contractor may work up to 2 a.m., Monday to Friday with occasional weekend work.
Traffic, transit and pedestrian impacts (1731-1741 Powell):
- Several parking spaces may be unavailable in front of the construction area.
Connecting People. Connecting Communities.
Muni Service Impacts: The bus stop for the 38 Geary Route on Geary Boulevard at Stockton Street is temporarily closed until late November. Board bus on Geary Boulevard at Powell Street.
The bus stop on Bryant Street at 4th Street has been relocated to the mid-block of Bryant Street between 4th and 5th streets until Nov. 25.
Contact Us: If you have questions about construction or the Central Subway Project you can reach us at central.subway@sfmta.com or by phone at 415-701-4371.
For More Information: The Central Subway team posts frequent project updates on a variety of social media outlets. To find out more about the project and construction progress, follow us on Facebook, Twitter, Instagram or Flickr, and check out our blog.
Construction schedules are subject to change.